[J-Endres]

MRzeroCore 1.3 added bifti as a dependency. The playground notebooks that run pip install MRzeroCore --no-deps don't get it, so they break.

This PR adds !pip install bifti --no-deps right after the MRzeroCore install in the 18 notebooks that use --no-deps. Where the original line had &> /dev/null, the new line keeps it.

bifti is installed with --no-deps too. Its requirements are numpy, nibabel and requests, and Colab already ships all three. The pin numpy>=2.5.1 would otherwise make pip upgrade Colab's numpy, which is the kind of breakage the --no-deps installs are there to avoid.

Notebooks that run a plain pip install MRzeroCore already get bifti and are unchanged.

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Generated by Claude Code

[github-actions]

Simulation test: main (before) vs. this PR (after)

Sequence	Status	max mag NRMSE	max phase RMSE	max runtime Δ
mr0_DREAM_STE_seq	✅	0.00e+00	0.00e+00	+4.0%
mr0_DWI_SE_EPI	✅	0.00e+00	0.00e+00	+3.7%
mr0_EPI_2D_seq	✅	0.00e+00	0.00e+00	+4.7%
mr0_FID_seq	✅	0.00e+00	0.00e+00	+0.6%
mr0_FLASH_2D_seq	✅	0.00e+00	0.00e+00	+5.0%
mr0_GRE_to_FLASH	⚠️	–	–	–
mr0_RARE_2D_seq	✅	0.00e+00	0.00e+00	+6.6%
mr0_SE_CPMG_seq	✅	0.00e+00	0.00e+00	+4.9%
mr0_STE_3pulses_5echoes_seq	✅	6.86e-09	1.49e-08	+7.5%
mr0_TSE_2D_multi_shot_seq	✅	0.00e+00	0.00e+00	+1.6%
mr0_bSSFP_2D_seq	✅	0.00e+00	0.00e+00	+2.2%
mr0_diffusion_prep_STEAM_2D_seq	✅	0.00e+00	0.00e+00	+16.2%

✅ mr0_DREAM_STE_seq: All tests passed.

✅ mr0_DWI_SE_EPI: All tests passed.

✅ mr0_EPI_2D_seq: All tests passed.

✅ mr0_FID_seq: All tests passed.

✅ mr0_FLASH_2D_seq: All tests passed.

⚠️ mr0_GRE_to_FLASH: No comparison possible: [Errno 2] No such file or directory: '/home/runner/work/MRzero-Core/MRzero-Core/tests/simulation_test/ref_files/mr0_GRE_to_FLASH.seq.npz'

✅ mr0_RARE_2D_seq: All tests passed.

✅ mr0_SE_CPMG_seq: All tests passed.

✅ mr0_STE_3pulses_5echoes_seq: All tests passed.

✅ mr0_TSE_2D_multi_shot_seq: All tests passed.

✅ mr0_bSSFP_2D_seq: All tests passed.

✅ mr0_diffusion_prep_STEAM_2D_seq: All tests passed.

Workflow run — raw .npz data is attached as artifacts.